Coupling



Feb. 17, 1948. J. s. CARILLO COUPLING Filed Feb. 1, 1945 /Iff lise/v 5f('a'rdzllo INVENTOR..

,affix '2 sheets-sheet 1 Feb. l17',` 1948. J, s, CARDILLO 2,436,248

.COUPLING Filed Feb. l, 1945v 2 Sheets-Sheet 2 Patented Feb. 17, Ik 1948Joseph S. Cardillo, Elyria, Ohio, assigner to Romec Pump Company,Elyria, Ohio, a corporation of Ohio Application February 1, 1945, SerialNo. 575,209

3 Claims.'

This invention relates to couplings and particularly to couplingsadapted to absorb torsional vibration.

'Particularly in the driving of instrumentalities by or from internalcombustion engines it has been found that the inherent torsionalvibration of the driving shaft'has deleterious eifects upon driveninstrumentalities. My purpose vis to provide a couplingwhich has hightorque characteristics in either direction of rotation, is compact insize, is economical of manufacturing cost and is foolproof and durablein that even an injury to one of the spring parts thereof will notinterrupt the transmission of torque albeit the impairment of thevibration absorbing characteristic may in part result.

Other objects will appear from the following description of a preferredform of my invention reference being had to the accompanying drawings inwhich Figure l is a longitudinal sectional view of the parts comprisingmy coupling; Figure 2 is a transverse section taken along the line 2--2of Figure 1; Figure 3 is a broken'section taken along the broken line3-3 of Figure 2; Figure 4 is an end4 elevation of one of 'the couplingmembers; Figure 5 is a side elevation of the same coupling member;Figure 6 is an end elevation of the other coupling member, and Figure 7is a side elevation of said other` coupling member.

In the preferred form of my invention illustrated in the drawings eitherof the two main coupling members I and/or 2 may be the driving or drivenmember depending on the direction in which the coupling is related tothe driving instrumentality. For convenience I shall refer to thedriving member as the member 2 and the driven member as the member I, itbeing understood that the position and direction of drive may bereversed when desired. Both the driving and driven members are shown tohave conventional shaft parts S which may take any desired or convenientform, and which per se are not part of my invention. The driving member2, see Figs. 4 and 5, comprises in addition to the shaft S an integralplate or disc-like portion on diametrically opposite parts of which aredisposed integral head portions 2I and 22 which may be of identical formand vwhich head portions each have an undercut arcuate groove 23 and 24.The grooves 23 and 24 are formed between the face of plate or disc 20and inwardly extending lips or jaws 25 and 26 respectively which extendradially inwardly of the head and define with the plate 20 therespective grooves 23 and 24. The radial inward face or surface of eachof the jaws 25 and 26 comprises a central'and long arcuate sur-4 face,21 on the lug or jaw 25, and 28 on the lug or jaw 26, see Figure 4.Adjacent to and at the respective Yends of the arcuate surfaces 21 and28 are smaller arcuate surfaces or seats, 29 and 30 adjacent the surface21, and 3| and 32 adjacent the ends of the surface 28.

. The driven member I, see Figures 6 and '7, is constructed to becomplementary to the driving member 2' and as will more fully appear isarranged to intert with the driving member somewhat in the manner of 'abayonet lock whereby to be detachable therefrom in one position butengageable'therewith with freedom of circumferential motion but withoutsubstantial freedom of longitudinal or radial motion.

The driven member I comprises a disc-like portion I0 integrally formedwith the shaft portion S. AThe disc portion I0 carries on oppositeperipheral portions thereof axially extending lugs II and I2 which maybe substantially identical in form and are diametrically oppositelydisposed of the disc I0. Each of the lugs II and I2 have a centralarcuate channel, I3 in the lug II, and I4 in the lug I2. The channels I3and lA respectively are of width and depth to receive the jaws 26 and 25respectively of the driving member 2 when the parts are engaged as shownfor example in Figure 1. Each of the lugs II and I2 alsor comprise aradially inwardly extending and reenforcing part I5 and IS whichstrengthen the .lugs and underlie the bottom surface of the channels I3and I4 respectively. Each of the lugs II and I2 have small inwardlyfacing axially spaced arcuate surfaces or seats, I'l and I8 in the lugIl, and I9and I9a in the lug I2. These small arcuate surfaces I1, I8, I9and I9a are so disposed in relation to the center of the driven member,and the center of the driving member when the parts are assembled, as tobe longitudinally coextensive with and adjacent to the arcuate sur-Vfaces 29, 30, 3l and 32 in the driving member 20, and lie on oppositeaxial sides of the surfaces 29--32 respectively. This relationship ofthe small arcuate surfaces may be seen in greater clarity and detail intheir assembled relation in Figures 2 and 3 of the drawings.

The head parts ofthe driving member and the lug parts of the drivenmember are so spaced diametrically of their respective members that whenone of the members is turned at from its position shown in Figures 4 to'l and the other* isretained in the position therein shown, that thelugs and heads of the respective members may be intertted and upon beinggiven a 90 turn will assume an interlocked relation shown in Figures 1to 3 of the drawings. In this position, as above mentioned, the smallarcuate surfaces 29 to 32 and i'l to lila will have become axiallyaligned so as to deiine a continuous arcuate surface as shown in sectionin Figure 3.

When the driving and driven members are thus interengaged the additional'parts of the coupling are assembled therewith. These parts comprisefour spring seat members 40, 4i, 42 and 43, see Fig. 2, the outwardlydisposed arcuate surfaces of which smoothly engage the respective setsof seat surfaces 29 to 32 inclusive and I1 to I 9a inclusive, the latterspanning the former axially whereby to prevent tipping or misallgnmentof the members 40-43 when any of the surfaces |1 to |9a or 29-32 are outof contact there-l with. Between oppositely disposed pairs of thesespring seats are disposed compressed springs 50 and i, which springsurge the respective pairs of seats 40 and 42, and 4i and 43, oppositeiyaway from each other and firmly into the respective groups of seatsurfaces in which each of the seat members bear.l Each of the seatmembers may and preferably does have an inwardly extending portion E,the innermost ends of adjacent pairs of which are'spaced apart a littlemore or less as desired so that in the event of a failure of a springthese extensions E might bottom or might bottom before a failure of aspring to limit the compression thereof. 'In operation it will beobserved that when torque is transmitted from one member to the otherthat both of the springs 5D and 5l are simultaneously compressed sincethe oppositely disposed spring seat members such as 40 and 42 are bothengaged by both the driving and driven members 'through the seatsurfaces il' to 19a and 29 to 32, so that any circumferentialdisplacement between thedriving and driven members causes the springseat members to be moved toward each other, i. e. causes the member 4D,and 42 to approach while at the same time causes the member 4I toapproach the member 43. 'Ihus torque is transmitted from the driving anddriven members through both springs 50 and 5I at all times. It may beillustrative to say that if either spring were to fail the whole torquewould be transmitted through the other spring regardless of ther failureof the rst spring.

As may perhaps be best seen in Figures 2 and 3 Vthe springs with theirrespective seat members may be readily inserted and removed from theirworking position as by compressing the same with an appropriate toolwhereby to bring the arcuate outwardly disposed surfaces of the members40- 43 within the coacting seating surfaces il to lSa and 29 to 32 asabove mentioned. It will also be observed particularly from Figure 2that both of these springs are acting in chords of the circle of thedisc l0, and preferably are wholly contained within the. peripheraloutline of the disc in. Thisleads to compactness, ready accessibilityand replacement of the springs or the adjacent members and easyinspection and repair of the parts.

My invention provides a coupling in which high torque load and capacityis provided in a very simple and compact device. Both of the springs 50and 5|k share all of the loads imposed upon the coupling and areoperative in damping shock. loads and/or angular accelerations fromeither the driven or driving instrumentality in either direction ofrotation.

4 While I have illustrated and described a. preferred embodiment of myinvention. alterations,

changes and improvements will occur to those skilled in the art withinthe precepts and teachings hereof and I do not care to be limited to thepreferred form of my invention as herein specically illustrated or inany manner other than by the claims appended hereto.;

I claim: v l v 1. In a coupling having a driving member and a drivenmember the combination of diametrically oppositely disposed partscarried by the driving member and diametrically oppositely disposedparts carried by the driven member, said parts respectively having riband channel portions intertting to permit relative circumferentialmotion therebetween while preventing longitudinal motion therebetween,each of said parts having diametrically oli-set and axially aligned seatportions, spring spaced members supported in said seat portions, andsprings compressed therebetween whereby to resiliently resist anyrelative circumferential movement between said parts of said memberssaidparts when interltted defining circumferentially open spacestherebetween into and from which said last named members and springs maybe inserted and removed to and from said seats, said driving and drivenmembers overlying the ends of said spring spaced members when the latterare seated in said seat portions.

2. In a coupling comprising axially` aligned driving and driven members,the combination of head and lug parts interengaged and respectivelycarried by said members, each said lug and head parts havingdiametrically offset and axially aligned seats oppositely spaced onchords of the circle of which said members are axially aligned, springsdisposed in the chords of said circles respectively, and means removablyengageable with said seats and said springs and urged by said springsinto the said seat portions of said lug and head parts whereby saidmeans are urged toward each other upon any circumferential displacementbetween said lug and head parts, said lug and head parts wheninterengaged defining circumferentially open spaces therebetween intoand from which said springs and said means may be inserted and removedradially to and from said seats, said members confining said meansaxially.

3. In a coupling the combination of a driving member having a disc likeportion, a driven member having a disc like portion, the disc like por.tions of said members being coaxially disposed and oppositely facing,the disc like portion of one of said members having a pair of integrallyformed diametrically oppositely disposed head parts overhanging anddefining an inwardly facing channel adjacent said portion, the disc likeportion of the other of said members having a pair of integrally formeddiametrically oppositely disposed lug parts with inwardly extendingvreinforcing sections and with outwardly facing channelled sections thewalls of which remote from said portion being formed complementarily ofthe channels overhung by said head parts and adapted to intert therein,said head parts being adapted to lit into the channeled sections of saidlug parts, each of said parts embracing substantially a quadrant of saidportions whereby upon being intertted together substantiallyquadrantlike circumferentially open spaces are provided between saidportions, each said parts having arcuate seats'disposed transversely ofchords of v 2,438,249 5 6 axially spaced circles struck from the axis ofalignment of said members, spring means aligned REFERENCES CITED withsaid chords and disposed in said spaces and The following references are0f record in the interposed between said seats, members borne file ofthis patent:

upon by said spring means and enga-ged by said 5 UNITED STATES PATENTSseats of each of said driving and driven members whereby to be displacedupon any relative cir- Number Name Date cumferential movementbetweensaid driving and 1,192,731 BatCheldeI July 25, 1916 driven members, saidspring means and said last .1,284,268 Eaton Nov.r12, 1918 named membersbeing insertable and removable 10 radially of said spaces to and fromsaid seats.

JOSEPH S. CARDILLO.

